7.8x+2.4x=20.4,列方程,还要解
7.8x+2.4x=20.4,列方程,还要解
7.8x+2.4x=20.4,列方程,还要解
7.8x+2.4x=20.4,列方程,还要解
2
7.8x+2.4x=20.4
10.2x=20.4
x=20.4÷10.2
x=2
等我要图片解答?
7.8x+2.4x=20.4,列方程,还要解
7.8x+2.4x=20.4,列方程,还要解
7.8x+2.4x=20.4,列方程,还要解
2
7.8x+2.4x=20.4
10.2x=20.4
x=20.4÷10.2
x=2
等我要图片解答?